المنتجات الساخنة
Technical noteNatural bentonites—influence of the ion
网页2001年9月1日Typical course of permeability for GCLs over the time in dependence of ion exchange, ion exchange and desiccation, self-sealing, electrolytic content, type of bentonite and kind of pre-swelling. The normal stress conditions are 15–20 kN/m 2 the
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Bentonite an overview ScienceDirect Topics
网页Regrettably, bentonite has little anion-exchange capacity. Therefore, it is relatively ineffective in removing either neutral or negatively charged proteins. Because the
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The role of ion-exchange bentonites in changing the properties of
网页2012年2月1日The work goal of the present work is to study the effect of adding ion-exchanged bentonites (IEB) to SBR matrix, where the sodium ions in bentonites were
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Ion Exchange an overview ScienceDirect Topics
网页Abstract The process of ion exchange is one of the most utilized techniques in water and wastewater treatment as well as in separation processes as chemical synthesis, medical
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Evidence of ammonium ion-exchange properties of natural
网页2013年12月1日Evidence of ammonium ion-exchange properties of natural bentonite and application to ammonium detection. Ammonium exchange with hybrid PVC-bentonite
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Evidence of ammonium ion-exchange properties of natural
网页2013年12月1日In this work, the system designed for ammonium detection is based on plasticized PVC, the ion-exchanger is bentonite. Bentonite is formed by weathering of
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Cation Exchange Properties of Bentonite The Journal of Physical
网页Intercalation of dicarboxylate anions into a Zn–Al–Cl layered double hydroxide: microcalorimetric determination of the enthalpies of anion exchange. J. Mater.
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Ion Exchange Behavior of the Febex Bentonite. 1. Na/K, Na/Mg
网页ABSTRACT Na/K, Na/Mg, and Na/Ca exchange isotherms have been experimentally determined for the FEBEX bentonite. Na-homoionized FEBEX−bentonite was reacted
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Ion Exchange Behavior of the Febex Bentonite. 1. Na/K, Na/Mg
网页2011年3月21日Results indicate that for the Na/K exchange reaction, Vanselow coefficients are larger than one, what is in agreement with the tendency of the smectite of having
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Natural bentonites—influence of the ion exchange and partial
网页2001年9月1日As a consequence of the ion exchange of a sodium bentonite into a calcium bentonite a certain reduction in volume due to the decreasing distances between the montmorillonite flakes and a loss of water of approx. 6–12% can be observed (Egloffstein, 2000).
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Characterization and purification of Algerian natural bentonite
网页2021年9月1日Bentonitic clays from the Hammam Boughrara deposit in the Maghnia area (northwestern Algeria) were studied by mineralogical, chemical and physicochemical characterization to evaluate their potential suitability as raw and purified materials in pharmaceutical and cosmetic applications. Natural bentonite was purified by Na+ ion
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Heterogeneous Ion Exchange in a Flowing System
网页Selenate removal via continuous fixed-bed column with nanoscale zero-valent iron supported on bentonite-zeolite pellets. Journal of Water Process Engineering 2023, 53,103843. Membrane distillation and ion exchange combined process for mining wastewater treatment, water reuse, and byproducts recovery. Chemical Engineering
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The role of ion-exchange bentonites in changing the properties
网页2012年2月1日The role of ion-exchange bentonites in changing the properties of styrene–butadiene rubber composites D.E.El-Nashar N.M.Ahmed A.A.Yehia https://doi/10.1016/j.matdes.2011.07.072 Get rights and content Natural bentonite containing Na and Ca was cationically exchanged with Ba, Sr, Cu and Cu–Ba.
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SYNTHESIS OF LARGE-SWELLING Na-TYPE BENTONITE BY HYDROTHERMAL ION EXCHANGE
网页bentonite to be 10–30 µm, and with particle aggregation. Hereinafter, montmorillonite in the bentonite powder was simply noted as “montmorillonite.” Hydrothermal ion exchange of bentonite was performed, using ion exchange water under various temperatures, times, and treatment cycles. It was found that Ca2+ in the raw mont-
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Cation Exchange Properties of Bentonite The Journal of Physical
网页On the driving force of cation exchange in clays: Insights from combined microcalorimetry experiments and molecular simulation. Geochimica et Cosmochimica Acta 2009,73 (14),4034-4044.
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Ion exchange isotherms in solid: electrolyte solution systems
网页2015年11月20日The equations are applied for cation exchange processes of bentonite clay (cobalt, manganese, mercury ions with calcium-bentonite; strontium ions with sodium-bentonite; cesium ions with lanthanide bentonite; lutetium ion with calcium-bentonite).
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Characterization of Compacted Ca- and Na-Bentonite with
网页2023年6月30日Lee et al. reported that some characteristic ion exchange and cation release phenomena occur in the bentonite clay interacting with aqueous Cu cations. Therefore, XRD was used to determine whether the presence of Cu in the bentonite could affect the interlamellar spacing of the montmorillonite or the types of solids present.
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Ion exchange isotherms in solid: electrolyte solution systems
网页The equations are applied forcation exchange processes of bentonite clay (cobalt, man-ganese, mercury ions with calcium-bentonite; strontiumions with sodium-bentonite; cesium ions with lanthanidebentonite; lutetium ion with calcium-bentonite).
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Enhancement of adsorption efficiency of crystal violet and Nature
网页2023年7月4日Bentonite renders enhanced surface reactivity, ion-exchange features, flexibility, nontoxicity, biocompatibility, and high surface area leading to an improved adsorption capacity 46.
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Characterization and purification of Algerian natural bentonite
网页2021年9月1日Natural bentonite was purified by Na+ ion exchange treatment combined with sedimentation techniques. Before use in the pharmaceutical industry, bentonite samples must be safe and conform to recommendations and directives of pharmacopeia.
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Heterogeneous Ion Exchange in a Flowing System
网页Selenate removal via continuous fixed-bed column with nanoscale zero-valent iron supported on bentonite-zeolite pellets. Journal of Water Process Engineering 2023, 53,103843. Membrane distillation and ion exchange combined process for mining wastewater treatment, water reuse, and byproducts recovery. Chemical Engineering
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The role of ion-exchange bentonites in changing the properties
网页2012年2月1日The role of ion-exchange bentonites in changing the properties of styrene–butadiene rubber composites D.E.El-Nashar N.M.Ahmed A.A.Yehia https://doi/10.1016/j.matdes.2011.07.072 Get rights and content Natural bentonite containing Na and Ca was cationically exchanged with Ba, Sr, Cu and Cu–Ba.
Contact
Cation Exchange Properties of Bentonite The Journal of Physical
网页On the driving force of cation exchange in clays: Insights from combined microcalorimetry experiments and molecular simulation. Geochimica et Cosmochimica Acta 2009,73 (14),4034-4044.
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SYNTHESIS OF LARGE-SWELLING Na-TYPE BENTONITE BY HYDROTHERMAL ION EXCHANGE
网页bentonite to be 10–30 µm, and with particle aggregation. Hereinafter, montmorillonite in the bentonite powder was simply noted as “montmorillonite.” Hydrothermal ion exchange of bentonite was performed, using ion exchange water under various temperatures, times, and treatment cycles. It was found that Ca2+ in the raw mont-
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Ageing characteristics related to cation exchange and interlayer
网页There are discussions in the literature about the factors that influence the sodium activation process and about the effect of this process on the properties of the activated bentonite, such as the activation mechanism (cation exchange diffusion), ageing time, initial moisture content of the bentonite, Na 2 CO 3 dosage, viscosity of the thixotropic pulp of the
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Characterization of Compacted Ca- and Na-Bentonite with
网页2023年6月30日Lee et al. reported that some characteristic ion exchange and cation release phenomena occur in the bentonite clay interacting with aqueous Cu cations. Therefore, XRD was used to determine whether the presence of Cu in the bentonite could affect the interlamellar spacing of the montmorillonite or the types of solids present.
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Shear characteristics of compacted bentoni tes immersed in KOH
网页bentonite was interpreted as primarily resulting from a combination of dissolution and precipitation. Keywords: bentonite, ion exchange, dissolution, precipitation, triaxial compression 1 INTRODUCTION Owing to its low permeability, compacted bentonite is used as engineered barriers in radioactive waste disposal sites to delay nuclide migration.
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Anticorrosive efficiency of ion‐exchanged bentonites in
网页2013年5月17日– Ion‐exchange clays containing sodium such as bentonite and montmorillonite have the ability to exchange their cations. Few studies conducted with this type of ion‐exchange pigments are not conclusive about their anticorrosive efficiency. The present research aims to address the study on the anticorrosive efficiency of this type of
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Enhancement of adsorption efficiency of crystal violet and Nature
网页2023年7月4日Bentonite renders enhanced surface reactivity, ion-exchange features, flexibility, nontoxicity, biocompatibility, and high surface area leading to an improved adsorption capacity 46.
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